History of the Chaudière Crossing - Commentary on the construction of a series of wooden bridges designed and built by Mactaggart in 1828. - http://www.tc.gc.ca/programs/surface/bridges/chaudierehistory.htm
John Mactaggart - Biography and references by G. S. Emmerson. Provided by Canadian biography online. - http://www.biographi.ca/EN/ShowBio.asp?BioId=37115